11 Scariest Final Shots In Thriller Movie History

4. Bug

William Friedkin might have defined the 70s with horrors like The Exorcist, but he's consistently put out some of the most disturbing and challenging movies in the decades since.

2006's Bug is perhaps his most unhinged work to date, chronicling the tale of two lovers who become entangled in a paranoia-fuelled conspiracy. The man, played by Michael Shannon, convinces his new girlfriend that he's infested with bugs after being in a government army experiment, and now they're taking over the house.

The viewer - and everyone else the pair comes into contact with - cannot seem to see the little critters, but that doesn't stop the duo becoming convinced they're at the centre of a conspiracy, and mutilating themselves to vanquish the insects burrowing under their skin.

This escalates to a ridiculous level: with their apartment covered in tin-foil the pair, bloody and stinking, murder a man and dig around his insides because they think he's a robot sent by the government.

As you might have guessed, the film revels in ambiguity, with one post-credit sequence hinting that maybe none of the terrible acts happened. The final, final shot contradicts this though, and shows the murdered man remaining on the floor, guts hanging out, suggesting that the horror wasn't entirely in the heads of these psychopathic people.